import java.util.Arrays;

public class three_max {
    public static void main(String[] args) {
        System.out.println(bf(new int[]{1,2,3,4,5,6}));
        System.out.println(getMaxMin(new int[]{1,2,3,4,5,6}));
    }
//线性扫描
    private static int getMaxMin(int[] nums) {
        int max1 = Integer.MIN_VALUE,max2 = Integer.MIN_VALUE,max3 = Integer.MIN_VALUE;
        int min1 = Integer.MAX_VALUE,min2 = Integer.MAX_VALUE;
        for(int x : nums){
            if(x>max1){
                max3=max2;
                max2=max1;
                max1=x;
            }else if(x>max2){
                max3=max2;
                max2=x;
            }else if(x>max3){
                max3=x;
            }
            if(x<min1){
                min2=min1;
                min1=x;
            }else if(x<min2){
                min2=x;
            }
        }

        return Math.max(min1*min2*max1,max1*max2*max3);
    }
//暴力算法
    private static int bf(int[] nums) {
        Arrays.sort(nums);
        int n = nums.length;
        return Math.max(nums[0]*nums[1]*nums[n-1],nums[n-1]*nums[n-2]*nums[n-3]);
    }
}
